Bevel-square.



No. 802,083. PATENTED OCT. 17, 1905.

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No. 802,083. PATENTED 0GT.17,'1905. o. B. PARNELL.

BEVEL SQUARE.

APPLICATION-FILED NOV. 5. 1904. I

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@Z j I \x/ wai orr CHARLES B. PARNELL, OF GREENFIELD, MASSACHUSETTS.

BEVEL-SQUARE.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed November 5, 1904:, Serial No. 231.521.

To all whmn it may concern;

Be it known that I, CHARLES B. PARNELL, a citizen of the United States of America, and a resident of Greenfield, in the county of Franklin and State of Massachusetts, have invented certain new and useful Improvements in Bevel- Squares, of which the following is a.full,clear, and exact description.

This invention relates to improvements in bevel-squares of the kind having a stock or a main bar and one or more blades pivotally connected to the main bar and adjustable relatively thereto at any desired angle,together with means for adjustably moving the blade or blades.

The object of the invention is to provide improved blade-moving and blade looking or retainingmeans.

The invention consists in the construction and combination of parts, all substantially as hereinafter fully described, and set forth in the claims.

In the drawings, Figure 1 is in substance a plan view of the bevel-square, the stock and some of the other parts being shown in hori- Zontal longitudinal section, the blades being shown as positioned angularly to the length of the stock. Fig. 2 is a view similar to Fig. 1, but showing the blades folded in. Fig. 3 is an edge view of the bevel-square. Fig. 4 is a perspective view of the stock or main bar.' Fig. 5 is a cross-sectional view as taken on line 5 5, Fig. 2. Fig. 6 is a perspective view of a slide-block comprised in the bevelsquare. Figs. 7 and 8 are views showing details of construction for results hereinafter referred to, Fig. 7 being a face view of the square and Fig. 8 a longitudinal section on line 8 8, Fig. 7.

Similar characters of reference indicate corresponding parts in all of the views.

In the drawings, A represents the stock or main bar, the same being split longitudinally from one end nearly to the other end, the latter end having, however, the solid portion a uniting the upper and lower portions 6 b of the stock, the opening 0 between the members 6 6 being sufficiently wide for accommodating and permitting free movements of the blades B B, which are made flat and of thin metal and are respectively pivoted at (Z d to the upper and lower separated members 6 b of the stock.

of which a single stud g engages, said stud being carried by a split slide-block D, which is accommodated in a longitudinal slideway or opening it made in both members Z2 I) of the stock. This slide-block D, formed bifurcated and having the solid end portion a, has the opening 7' between its legs ls about as wide as the opening 0 in the stock and to give sufficient space for accommodation therewithin of the thin metallic blades B B at the opposite end portions thereof. The longitudinal movement of the slide-block D causes swinging movements of both blades by reason of the engagement of the stud g in the cam-slots f, and the means for moving the slide-block endwise is found in the rod G, which is extended longitudinally and centrally Within the stock, being rotatable relatively to the latter, but incapable of endwise movement relatively thereto, the inner extremity of said rod, which is screw-threaded, as represented at m, screwengaging in the threaded opening'a in the solid part of the slide-block.

The operating-rod Gr is provided at'its end adjoining the solid end of the'stock with a handle or thumb-knob 0. The collar 19, formed on or affixed to the rod, by its abutment against the metallic trimming It prevents the outward movement of the rod, While the thumb-piece 0 acts as a shoulder to prevent any inward movement.

t t represent metallic trimmings for the opposite sides of the stock at the end portion of the latter which is farthest from the thu mbpiece.

The shape of the cam-slots or cam-grooves in the blades may be variable, whereby the swinging motions may be imparted gradually or rapidly and in a greater or less extent in accordance with the preference of the constructor.

As shown in Figs. 7 and 8, the pin or stud g, movable bodily with and as a part of the slidable block, may be controlled by a screw 41, whereby such pin is adjustable as to its length relatively to the thickness of the slideblock D and so that its extremity will protrude accordingly, as may be desired, through the cam-slots in both of the blades, whereby both of the latter-will be simultaneously thrown in and out or whereby but one of the blades will be engaged and operated.

The screw 1) may slide in the slot 20 in unison with the slide-block, and its threaded shank screw-engaging in the screw-tapped outward motion of the stud.

' ally connected to the bar, and each having a hole in the stud insures 0n the turning of the screw in the proper direction the inward or Having thus described my invention, what I claim, and desire to secure by Letters Patent, is i 1. In a bevel-square, the combination with a bar or stock, and one or more blades pivotcam formation, of a member slidable along the bar, and engaging the cam of each blade and an operating-rod rotatably mounted on the bar, and having a screw-threaded engagement with the slidable member. 2. In a bevelsquare, the combination with a stock consisting of a bar, having a longitudinal slit therein extending from one 'end thereof nearly to the other, and having longitudinal recesses at opposite sides of said slit, of one or more blades pivotally connected to the bar near the open end of the slit, and located in the latter, and each having a cam-slot, a member located in and slidable along the bar, having a pin engaging in the blade camslots, and means for imparting the sliding movement thereto. f

3. In a bevel-square, the combination with a stock consisting of a bar, having a longitudinal slit therein extending from one end thereof nearly to the other, and having longitudinal recesses at opposite sides of said slit, of one or more blades pivotally connected to the bar near the open end of the slit, and located in the latter, and each having acam-slot,

and a member located within and slidable along the bar, formed bifurcated and embracing the blades and having a stud engaging in the blade cam-slots, and means for imparting the sliding movement thereto.

4. In a bevel-square, the combination with astock consisting of a bar, having a longitudinal slit, and having longitudinal recesses at opposite sides of said slit, and one or more blades-pivotally connected to the bar near one end of the latter, and located in the slit, and each having a cam-slot, of a slide-block located in and slidable along the bar, having a pin engaging in the slot-blades, a rod rotatably mounted on and extended longitudinally within the stock, but non-movable endwise,

, and screw en'gaging the said slide-block substantially as described.

5. In a bevel square, the combination with a bar or stock and a pair of blades pivotally connected t'o th'e bar, and each having a cam formation, of a block slidable along the bar and provided with a stud which is adjustable whereby it may be positioned to simultaneously engage the cams of both blades or to have an engagement with the cam of but one of the blades, and m'eans for imparting a backward-and-forward movement to the block.

Signed by meat Springfield, Massachusetts, in presence of two subscribing witnesses.

CHARLES B. PARNELL. Witnesses:

WM. S. BELLoWs, G. R. DRI'so'oLL. 

